In which head regions should normal alpha NOT be seen in adults?

Alpha waves, which typically have a frequency range of 8-12 Hz, are primarily associated with a relaxed, calm, and alert mental state. In adults, these waves are most prominently seen in the occipital regions, especially when the eyes are closed and the individual is awake but relaxed.

The frontal regions are less likely to exhibit normal alpha activity compared to the posterior regions of the brain. It is in the frontal regions where beta activity is often more dominant, especially during active thinking, problem-solving, and decision-making tasks. Therefore, the absence of alpha waves in the frontal regions is consistent with their functional role, opposite to that of the occipital regions where alpha activity is expected.

In contrast, temporal and central regions can show alpha activity under certain conditions, although it's less pronounced than in the occipital regions. This distinction reinforces the idea that frontal regions are not typically associated with normal alpha wave presence in adults.